A grand piano, a concert hall, an original theme. The pianists have performed the theme and their own improvisations or variations on it. Every pianist has performed his favourite genre: classic, jazz, pop, etc.
During the performance, the pianist wore a special brain-headset that turns his brain's activity into pictures on a big screen. The audience could "peep" what the pianist feels, thinks, lives while he is playing.
Here are the pianists performing Yae Variations at Piano City Milano 2014